Collapse analysis of nanofibres

Xiang Fa Wu, Yuris Dzenis

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Continuous nanofibres fabricated by the electrospinning technique have found increasing applications (e.g. nanofibre composites, nanofibre devices, bioengineering tissue scaffolding, etc). For a nanofibre network subjected to a small external perturbation, the fibre segments within the network may deflect and stick to each other under the condition that their surface adhesion energy overcomes the elastic strain energy induced by fibre bending. Therefore, this paper aims to study adhesion-induced nanofibre collapse and relevant criteria. A simple fibre collapse model was proposed, which is based on the contact of two deflected elastic filaments under surface adhesion. Four fundamental fibre collapse modes (i.e. fibre-flat substrate, parallel fibres, orthogonal fibres and fibres at arbitrary angle) were considered, and corresponding collapse criteria were determined in explicit forms. Effects of fibre elasticity, surface adhesion and fibre geometries on the collapse criterion were explored in a numerical manner. Results show that for a fibre segment pair at a relatively large angle, the critical distance to induce the fibre collapse is independent of the fibre radius. This distance is a function of the fibre aspect ratio and the material intrinsic length (γ/E, where γ is the surface energy and E is Young's modulus). The fibre collapse model developed in this study can be used as the theoretical basis for design and failure analysis of nanofibre networks and nanofibre devices, among others.

Original languageEnglish (US)
Article number285702
JournalNanotechnology
Volume18
Issue number28
DOIs
StatePublished - Jul 18 2007

Fingerprint

Nanofibers
Fibers
Adhesion
Tissue Scaffolds
Electrospinning
Strain energy
Interfacial energy
Failure analysis
Aspect ratio
Elasticity

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

Cite this

Collapse analysis of nanofibres. / Wu, Xiang Fa; Dzenis, Yuris.

In: Nanotechnology, Vol. 18, No. 28, 285702, 18.07.2007.

Research output: Contribution to journalArticle

Wu, Xiang Fa ; Dzenis, Yuris. / Collapse analysis of nanofibres. In: Nanotechnology. 2007 ; Vol. 18, No. 28.
@article{4810c19509034342a6f6591369b310d0,
title = "Collapse analysis of nanofibres",
abstract = "Continuous nanofibres fabricated by the electrospinning technique have found increasing applications (e.g. nanofibre composites, nanofibre devices, bioengineering tissue scaffolding, etc). For a nanofibre network subjected to a small external perturbation, the fibre segments within the network may deflect and stick to each other under the condition that their surface adhesion energy overcomes the elastic strain energy induced by fibre bending. Therefore, this paper aims to study adhesion-induced nanofibre collapse and relevant criteria. A simple fibre collapse model was proposed, which is based on the contact of two deflected elastic filaments under surface adhesion. Four fundamental fibre collapse modes (i.e. fibre-flat substrate, parallel fibres, orthogonal fibres and fibres at arbitrary angle) were considered, and corresponding collapse criteria were determined in explicit forms. Effects of fibre elasticity, surface adhesion and fibre geometries on the collapse criterion were explored in a numerical manner. Results show that for a fibre segment pair at a relatively large angle, the critical distance to induce the fibre collapse is independent of the fibre radius. This distance is a function of the fibre aspect ratio and the material intrinsic length (γ/E, where γ is the surface energy and E is Young's modulus). The fibre collapse model developed in this study can be used as the theoretical basis for design and failure analysis of nanofibre networks and nanofibre devices, among others.",
author = "Wu, {Xiang Fa} and Yuris Dzenis",
year = "2007",
month = "7",
day = "18",
doi = "10.1088/0957-4484/18/28/285702",
language = "English (US)",
volume = "18",
journal = "Nanotechnology",
issn = "0957-4484",
publisher = "IOP Publishing Ltd.",
number = "28",

}

TY - JOUR

T1 - Collapse analysis of nanofibres

AU - Wu, Xiang Fa

AU - Dzenis, Yuris

PY - 2007/7/18

Y1 - 2007/7/18

N2 - Continuous nanofibres fabricated by the electrospinning technique have found increasing applications (e.g. nanofibre composites, nanofibre devices, bioengineering tissue scaffolding, etc). For a nanofibre network subjected to a small external perturbation, the fibre segments within the network may deflect and stick to each other under the condition that their surface adhesion energy overcomes the elastic strain energy induced by fibre bending. Therefore, this paper aims to study adhesion-induced nanofibre collapse and relevant criteria. A simple fibre collapse model was proposed, which is based on the contact of two deflected elastic filaments under surface adhesion. Four fundamental fibre collapse modes (i.e. fibre-flat substrate, parallel fibres, orthogonal fibres and fibres at arbitrary angle) were considered, and corresponding collapse criteria were determined in explicit forms. Effects of fibre elasticity, surface adhesion and fibre geometries on the collapse criterion were explored in a numerical manner. Results show that for a fibre segment pair at a relatively large angle, the critical distance to induce the fibre collapse is independent of the fibre radius. This distance is a function of the fibre aspect ratio and the material intrinsic length (γ/E, where γ is the surface energy and E is Young's modulus). The fibre collapse model developed in this study can be used as the theoretical basis for design and failure analysis of nanofibre networks and nanofibre devices, among others.

AB - Continuous nanofibres fabricated by the electrospinning technique have found increasing applications (e.g. nanofibre composites, nanofibre devices, bioengineering tissue scaffolding, etc). For a nanofibre network subjected to a small external perturbation, the fibre segments within the network may deflect and stick to each other under the condition that their surface adhesion energy overcomes the elastic strain energy induced by fibre bending. Therefore, this paper aims to study adhesion-induced nanofibre collapse and relevant criteria. A simple fibre collapse model was proposed, which is based on the contact of two deflected elastic filaments under surface adhesion. Four fundamental fibre collapse modes (i.e. fibre-flat substrate, parallel fibres, orthogonal fibres and fibres at arbitrary angle) were considered, and corresponding collapse criteria were determined in explicit forms. Effects of fibre elasticity, surface adhesion and fibre geometries on the collapse criterion were explored in a numerical manner. Results show that for a fibre segment pair at a relatively large angle, the critical distance to induce the fibre collapse is independent of the fibre radius. This distance is a function of the fibre aspect ratio and the material intrinsic length (γ/E, where γ is the surface energy and E is Young's modulus). The fibre collapse model developed in this study can be used as the theoretical basis for design and failure analysis of nanofibre networks and nanofibre devices, among others.

UR - http://www.scopus.com/inward/record.url?scp=34447261926&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34447261926&partnerID=8YFLogxK

U2 - 10.1088/0957-4484/18/28/285702

DO - 10.1088/0957-4484/18/28/285702

M3 - Article

VL - 18

JO - Nanotechnology

JF - Nanotechnology

SN - 0957-4484

IS - 28

M1 - 285702

ER -